DIM-00014: Cannot open the Windows NT Service Control Manager. O/S-Error: (OS 5) Access is denied.Its means that the user from which you are using dbca has not sufficient privileges. But most of the users complaint that they are performing this task from Administrator user or they have only one account in windows and its administrator, but still they are facing this problem.
So the solution is very simple:
just run cmd with "run as administrator" and after that run dbca, now everything works fine.
